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Basics of Geopolymer concrete
- 1. SUBMITTED BY : • JINENDRA JAIN • SHYAM BHARADVA • DARSHAK HADIYA • PARESH LALWANI •GUIDED BY : KRISHNA NAIR •REFERENCE: Indian Concrete Journal • (July-2014)
- 2. An innovative material that is characterized by long chains networks of inorganic molecules—is a potential alternative to conventional portland cement concrete. COARSE AGGREG ATE FINE AGGREG ATE ADMIX TURES GEOPOLY MER CEMENT GPCC
- 3. GEO + Polymer Ecofriendly Chemical reaction between alumino silicate and silicates which are under highly alkaline condition which makes the polymer whose monomer is [-( Si-O2)z-Al-O]n (Silicate Siloxo).
- 4. Portland cement production is a major contributor to CO2 emissions as an estimated 5 TO 8 %of all human generated. atmospheric CO2 worldwide comes from the concrete industry. Because of Co2 emission in the atmosphere temperature is increased in atmosphere and global warming house effect causes.
- 5. PRODUCTION OF CEMENT (2017) Production of Portland cement is currently topping 2.6 billion tons per year worldwide and growing at 5 percent annually. NO COUNTRY PRODUCTION OF CEMENT (MILLION METRIC TON) 1 CHINA 2500 2 INDIA 280 3 UNITED STATES 83
- 6. ● Portland is not considered sustainable due to energy intensive process an high CO2 generation. ● It is estimated that production of one tonne of cement clinker required 2.9 to 4.7 GJ energy and produces 800 Kg of CO2. 5CaCO3+2SiO2 →(3CaO,SiO2)(2CaO,SiO2) + 5CO2
- 8. Geo polymer catagories Slag based geopolymer Rock based geopolymer Fly ash based geopolymer Alkali activated fly ash geopolymer Slag fly ash based geopolymer Fero sialate based geopolymer
- 9. Gel formation Conventional cement concrete Gel formation Geopolymer cement concrete
- 10. Properties O.P.C. G.P.C. Setting Time 30-300 minutes 10-60 minutes Compressive Strength 33-53 MPa (After 28 Days) 30-120 MPa (After 7 Days) Durability Moderate More Durable Than OPC CO2 Emission 800–900 kg/tonne 150-200 kg/tonne Water requirements 600 litres/ton 450 litters/ton
- 11. Geopolymer concrete also has a high resistance for chlorides so it can be used for 1. In coastal areas for buildings to resistance against chloride corrosion. 2. For cold climate places. 3. For concrete structure that will be constant attack from salt water.
- 12. The U.S. military is using geopolymer pavement coatings designed to resist the heat generated by vertical take off and landing aircraft (Hambling 2009) Construction and repair of highways, roads airport runways
- 13. Uses no portland cement. Uses industrial by products waste products like fly ash, copper slag and blast furnace slag. Reduces carbon dioxide emissions. Preserves natural resources like lime stone. Geopolymer concrete also has very high compressive strength. Geopolymer concrete also has very low shrinkage and creep. Geopolymer concrete is better and more reliable in extreme environments when compared to ordinary concrete. Additional innovation points for green buildings assessment.
- 14. Queensland’s University GCI building with 3 suspended floors made from structural geopolymer concrete